At one point there was only one left - Fowler's 12 Guineas (ie "252/-" in the shilling system) - which ended up in the hands of ABI, who contracted it out to Heriot Brewery and then Belhaven, so the
Belhaven Wee Heavy is arguably the One True representative of the "style" (such as it is, it's weird how the US has seized on it in the same way as ESB). Given that Greene King also have
Strong Suffolk in stock at the moment, it may be worth holding your nose and putting in an order - the Belhaven Stout is also great if you need to bulk out the order a bit.